Glass Seahorse Solar Radiometer

£ 32.00
Clear Solar Radiometer sphere with a glass seahorse stand.
In a vacuum inside a free-standing globe the vanes constantly revolve in sunlight. The simplest possible demonstration of solar power.
The radiometer is made by traditional Thuringian hand-blowing in Germany, of crystal-clear Lauschaer bottle glass. In the glass body is a 4-vane drive assembly, which turns under the influence of light. One side of each vane is black, the other is silver.
Height: ca. 23 cm. (9 in) Globe diameter: ca. 8cm. (3. 25 in)
The Crookes radiometer was invented by the chemist Sir William Crookes as the by-product of some chemical research. In the course of very accurate quantitative chemical work, he was weighing samples in a partially evacuated chamber to reduce the effect of air currents, and noticed the weighings were disturbed when sunlight shone on the balance. Investigating this effect, he devised the device named after him, still manufactured and sold to this day as a curiosity item.
This Solar Radiometer has a clear glass globe and features a beautiful stained-glass seahorse. In a vacuum inside a free-standing globe the vanes constantly revolve in sunlight; the simplest possible demonstration of solar power.
This radiometer was made using traditional Thuringian hand-blowing techniques in Germany, utilising crystal-clear Lauschaer bottle glass. In the glass body is a 4-vane drive assembly, which rotate under the influence of light. One side of each vane is black, the other is silver.
The Crookes radiometer was invented by the chemist Sir William Crookes as the by-product of some chemical research. In the course of very accurate quantitative chemical work, he was weighing samples in a partially evacuated chamber to reduce the effect of air currents and noticed the weighing’s were disturbed when sunlight shone on the balance. Investigating this effect, he devised the device named after him, still manufactured and sold to this day as a curiosity item.